Typewriting machine



uy l, W24., 3,499,936

A. G. F. KURovvsKl I TYPEWRITING MACHINE Filed March 19. 1921 L WMM /MM Patented .luly l, i924.

tlhllvll STATES laet@ PTNW' FFEC.

ALFRED G. F. KURDSK, OF BROOKLYN, NEW YORK, ASSIGNOB, T0 UNDERWOOD TYPE- WRTER COMPANY, OF NE'W YORK, N. Y., A CORPR-ATION 0F DELAWARE.

TYPEWR-TING IVIACHINE.

.Application filed March 19, 1921.

To all whom it may concern.'

Be it known that T, ALFRED G. F. KURowsin, a citizen of the United States, residing in Brooklyn Borough, in the county of Kings, city and State of New York, have invented certain new and useful Improve ments in Typewriting' Machines, of which the following is a specification.

This invention .relates t0 typewriting ma chines, and, more particularly, to means for rapidly advancing a worksheet forwardly around the platen a predetermined distance.

The invention is especially adapted to v expedite the introduct-ion of work-sheets to loca-te them in a uniform, first writing line, position.. Means are therefore provided by this invention for rapidly rotating the platen forwardly by a single stroke of an operating handle through a predetermined distance. A multiplying gearing between the operating handle and the platen shaft permits a rapid movement of the platen, so that` as the handle reaches its limit-ingpo- A sit-ion, a possible overthrow' of the platen,

due to its momentum, may result. lt is a feature of this invent-ion to provide a positive stopfor lthe platen to prevent such overthrow. It is a further feature of this invention to pro-vide limiting stops for the operating` handle which are easily and conveniently settable. Still another feature of this invention is to provide such an arrangement of part-s as to allow for the easy and convenient adjustment and assembling of the various parts.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure l is a plan view of a machine with the invention applied thereto, only rthe necessary cooperating elements being shown.

Figure 2 is an end view of the device shown in Figure 1, the operating handle being in its rearward position.

vFigure 3 is a. `view similar to figure 2, the operating handle being shown in its forward, or operated, position.

Figure 4 is a detail sectional view of the adjustable stop.

Figure 5 is a detail perspective view of the member' in which the adjustable stop is slidable, showing` also the pawl-releasing cam or' projection.

Figure 6 is a vertical section of the in- Serial No. 453,616.

vention as applied to an end wall of the platen-frame.

A rotary platen l is fixed to an axle 2 journaled in the end walls 3, 4 of a platenframe 5. The platen may be rotated by hand-wheels or knobs 6 fixed ou the ends of the platen axle, or by the usual line-space mechanism, comprising a line-space wheel 7 fixed to the platen axle and adapted to be rotated by a pawl 8 pivoted o-n a slide 0 driven Eby a line-spacel lever l0. Worksheets are fed over a rear paper-table ll beneath the platen, to which they are held by the usual front and rear feed-rolls i8 and d4, ancL upwardly to the printing point indicated by the type-head l2 in Figure 3.

As hereinbefore set forth, the work-sheet or web may comprise a series of similar forms adaptedto be typed in succession, the distance from the last. typed line on one form to the rst line to be typed on the nextv form being constant. During the typing operation, the plate-n may be line-spaced by the .finger-wheels 6 or the usual linespace mechanism operated by rthe lever 10. Vllien a form has been typed, however, and it is necessar.7 to rotate the platen to the first line on the next form, it is desirable t0 perform this rotation quickly. For this purpose, there is fixed to one of the end walls of the platen-frame, here shown as the right wall 4, a bracket 2() having vertical wall 2l in contact with the end wall 4, and a horizon-tal flange 22 overlying the top-plate 23 of the end wall and fastened thereto b v screws 24. Spaced from the bracket 2O by s uds 3l is a plate 30, fixed to said studs by screws 32. The vertical wall 21 of the bracket 2O is provided with a hub 33. A stub-shaft 34 passes through plate and is journaled in said hub at one. end, said end being grooved at 35 to provide a seat for a set-screw 36 which fastens the stub-shaft in any desired position.

Upon the stub-shaft 34 there are mounted, between the end of hub 33 and plate 30, a ratchet-wheel 40, to which is fixed a gfarwheel 41, and a stop-lever 42 connected to the stub-shaft by la hub 43. Said ratchet and gear-wheel run idly on the stub-shaft whilel the stop-lever is loos-elf,7 rotatable on said shaft. The hubs 33 and 43 and the ratchet and gear-wheels substantially ll the space between the bracket 2O and plate 30. Gear-wheel All meshes with. a gearwheel fixed to the platen axle 2 which projects through plate 80. The lever-arm 42 is bent at to overlie the gear-wheel le and is provided with a tooth 46 which engages gear-wheel #lll when arin is depressed. Arm 4Q is normally maintained in elevated position by a spring lf? iXJd a pin 4S on the arni and to a pin /l9 on the bracket.

@n the outer side of plate 30 there are loosely mounted on the stnb-shait`t a handle 5l and a combined stop-gage and pawlreleasing nieans 52, said handle and grave being' h-ild in place by a nut tll'serewed on the end ot the stub-shalt. livotcd on the handle 5l by a stud 60 is a pawl overlying` the ratchet-wh yel fr0 and pressed normally toward the ratchet-wheel by a' spring` 55 engaging pins 5G and 5? on the. pawl and handle, respectively. A hub (Si is screwed on the other end ot stud (S0 and encloses spring' 55 and pins and 5T. The rearward movement ot the handle 5l is limited by the Contact ot hub Gl with a horizontal projection G2 on the stop-gage. The latter nia-y be adjusted to various positions as will be described hereinafter. ln the final portion of the rearward niovenient of handle 5l, a pin 63 on pawl 5dis engaged and has its rearward niovenient arre. by a ledge ot said stoppage 52, causing' the pawl to be swung` out of engagement with the :het-wheel l0 against the action ot spring` To allow for the pivotal movement of pawl pin 5G operate/s in an arcuate slot 5S in handle 51.

Upon forward rnovcin'nt ol handle 5l, pin 63 will ride otl ledge 65, allowing the pawl to engage ratchet-wheel d0 and rota e it forwardly. Clince gear ll is to toe ratchet-wheel, it will rotate therewith` rotating gearovhcel 4A, and hence the platten.l a greater distance and at a greater speed, depending upon the ratio or gear-wheels 41 and all. This ratio can be any desired amount, depending upon the ainount oil platen rotation desired, the latter in turn depending` upon the bills or tornis used. As shown, the ratio ot' the wheels 471 and del is two to one, so that halt a revolution or the ha dle 5l will produce one coniglte revolution of the plate Since the speed of rotation et the platen is multiplied, there would be a tendency for the platen to overthrow, i. e., run past the predetermined stopping point, due to its momentum. To prevent such overthrow, the pawl 54tis provided with a pin which seats in a de pression 7l in the stop-lever -lQ when the forward inoveinnit of the handle is almost completed. Further movement ot the handle will force tooth 4:6 of the stop-lever between two adjacent teeth of the gear"v handle ledge To return the handle automatically to its rearward position, there 1s provided a spring; fixed to the stub-shaft and to a pin 7G on handle 5l. rlhe pin Y6 operates in a slot '.77 in plate 30, and the spring` house( in a recess 7S in the body oit the ratchelwheel d0. `Forward inoveinent ot handle 5l winds up the spring', which returns tlrc handle to its rearward position wh `n the operator releases `the handle. The tension of the spring` may be adjusted by loosening screws 3G and turning the stub-shaft.

The forward limiting,` position of the handle 5l is invariable, occurring.;- when the tooth ti Iiinto inesh with wheel 'lo allow tor rotation of the platen through variable distances, the stopf 52 is made adjustable. The stopinay be rotated about its pivot 8() to ion G2 n gaged by the handle. VThe gage ned in an adjusted position by a spring ligger Si cri-operating with any one of a series ol: holes in plate 80. Since the ratio oit gee-.r ll to gear lll has ben assumed to be two to one, one revolution of the ratchet-wheel will yield two revolutions ot the platen. Since a complete revolution of the platen corresponds to thirty-three linespaces., a complete revolution oit the ratchetwheel will correspond to sixty-sii linespaces. mh ratchet-wheel is therefor-e provided with siXty-six teeth on its periphery, each tooth corresponding` to a line-space. Provision is niade for lining the stopgage 52 in various positions, each position correspondino; to difference of one line-space troni the preceding' or succeeding` position. F or this purpose, the plate 30 is provided with holes arranged in staggered relation in two concentric rows to prevent cii'owdii'ig. To enable the springr plunger 8l to cooperate with either row, a cover plat-e 83, lined to plunger casing 84. is attached by screws 85 to a bloclr slidable laterally in opening: S7 of the stop-gage. A lianpge 88 on block 86 operates in a groove 89 adjacent the opening' 87 on the inner 'tace of the thus guiding the movement of the block.

The operation ot the device will be apparent from the above description, but is hrietlv as follows: Spring plunger 81 is pulled out clear of the openings in plate Btl, and the stop-ga is set a nuniber of linellO spaces back of its forward limiting position equal to the number of line-spaces between the last typed line of a form and the lirst line to be typed on the next form. The spring plunger having been set in the adjusted position, the handle 51 is rotated rearwardly until hub 6l rests on projection 62 of the stop-gage. The form is typed, being line-spaced by the usual line-space lever l0, or by knobs G, gear-wheels 41 and 44 meshing without affecting handle 5l, since the pawl 54 is out of engagement with ratchet-wheel 40. lVhen the last line of the form has been typed, handle 5l is swung forwardly against the action of spring 75 which winds up, and pin 63 rides oit ledge 65, allowing the pawl to engage vthe ratchetwheel. Further forward rotation of the handle produces a forward rotation of the platen until pin .70 engages in d epression 71 in the stop-lever 42, forcing tooth 46 between adjacent teeth on wheel 44 and preventing any further forward rotation of the platen. Spring 7 will return han-dle 5l to its rearward position, pin 63 riding up camsurface 64 until it rests on ledge 65, thus withdrawing the pawl from engagement with the ratchet-wheel.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

it. in a typewri'ting machine having a revoluble platen, line-space mechanism for advancing the platen by steps of deiinite extent, a platen-sweeping handle and rotationmult'plying connections between the handle and the platen, in combination, a pivotallymounted stop for limiting the tra-vel of the handle to control the extent of the platensweeping movement, and means for adjusting the stop to any one of a large number of positions, comprising a plate having a plurality of rows of holes so arranged that the travel of the handle can be varied by steps of line-space extent, and a latch -slidingly mounted on the stop for movement along the stop toward and fr m the pivot of the stop into position to enter any one of said holes to det-ain the stop in the adjusted positions determined by the holes.

2. ln a typewriting machine having a revoluble platen, line-space mechanism for advancing the platen by steps of definite line-space extent, a platen-sweeping handle and rotation-multiplying connecticns between the handle and the platen, in com` bination, a pivotally-mounted stop for determining a limiting` position of the platensweeping handle to control the extent of its operative movement, and means for adjusting said stop, con'iprising a plate having a plurality of arcuate rows of holes coaxial with the handle and so arranged that the travel of the handle can be adjusted to anv whole number of line-spaces, and a sto 3- adjusting device consisting of a slide mounted on the adjustable stop and movable therealong toward and from the pivot of the handle, and a manually-operable springplunger carried by the slide and movable therewith into position to co-operate with any one of said holes.

3. In a typewriting machine, the combination with a platen-frame, a platen-shaft journaled therein and carrying a platen, and a regular line-space mechanism for said platen, of a gear fixed to said shaft, an auxiliary platen-turning mechanism mounted on said frame and comprising a second gear meshing with said iirst gear, a ratchetwheel fixed to said second gear, an operating handle, and a pawl on said handle engageable with said ratchet-wheel when said handle is operated forwardly to rotate said platen, and a positive `stop for limiting the forward rotation of said platen, said stop comprising a lever pivotally mounted on said frame and engageable by said pawl, said lever having means at one end adapted to mesh with said first gear when said pawl engages said lever to prevent further rotationof the platen.

4. In a typewriting machine, the combination with a platen-frame, a platen-shaft j ournaled therein and carrying a platen, and

ya regular line-space mechanism for said platen, of a gear iixed to said shaft, an auxiliary platen-turning mechanism mounted on said frame and comprising a second gear meshing with said first gear, a ratchet-wheel fixed to said second gear, an operating handie, and a pawl on said handle engageable with said ratchet-wheel when said handle is operated forwardly to rotate said platen, a positive stop for limiting the forward rotation of said platen, said stop comprising a lever pivotally mounted on said frame and engageable by said pawl near the end of the forward movement of the operating handle, and having means at one end adapted to mesh with said first gear upon further movement of said handle to prevent further rotation of the platen, and a spring fixed at one end to said faine and the other end to said lever and normally maintaining the means at the end of said lever out of mesh with said iirst 5. In a typewriting machine, the combination witha platen-frame, a platen journaled therein, and a regular line-space mechanism for said platen, of an auxiliary platenturning mechanism comprising a `gear connected to rotate the platen, a ratchet-wheel fixed to said gear, an operating handle, and a pawl on said handle engageable with said ratchet-wheel when said handle is operated forwardly to rotate said platen, means for limiting the forward movement of said han- Cii dlea shaft onrnaled in said handle and carrying a hub at one end, said pawl being fixed to the other end of said shaft, a spring` with in said hub connected at one end to said. pawl and at the other end to said handle and normally pressing said pawl into engage-- ment with said ratchet-wheel, and a member con'iprising` `a combined stop-gage for limitingthe rearward movement of said handle and pand-releasing means to disengage said pawl from said ratchet-wheel before the handle reaches its rearward limit, said stopgage comin-isingv a horizontal proliection of said member .in the path of said hub, said hub contacting with said projection to l`mit the rearward movement of said handle.

6. In a typewriting machine, the comhination with a platen-frame, a platen journaled therein, and a regular line-space mechanism for said platen, of an auxiliary platenturning mechanism comprising a rear connectedto rotate the platen, a ratchet-wheel fixed to said gear, an operating handle, and a pawl on said handle engageable with said ratchet-wheel when said handle is operated forwardly to rotate said platen, a pin carried by said pawl, a positive stop for limiting the forward rotation of said platen, said stop comprising a lever pivotally mounted on said fra ac and engageable by the pin on said pawl, a second pin carried by said pawl, and a member comprising` a combined stopgage for limiting the rearward movement of said handle and pawlreleasing' means engageable by said second pin to discngage said pawl from said ratchet-wheel before the handle reaches its rearward limit.

7. .ln a typewriting machine, the combination with platen-frame, a platen jonrnaled therein., arm a regular line-space inecl'ianism for saitL pl "en, of an misil-lary platen-tr. ning` inechani'w comprising Lrear connected to rotate the -platen, a ratchc -wlieel lined to said gear, anYYopel-atingry handle, and a pawl on said handle ngageable with said ratchetwheel when said handle is operated forwardly to rotate said platen, means for lin'iiting the forward movement said handle, a stub-shaft fixed to said frame and upon which said auxiliaifyV platen-turning` mechenism is rotatably mounted, said ratchetwheel having` a recess in its surface, a spring housed in said. recess and connected to said shaft at one end and to said handle the other end for opposing said forward movement and mainte.ining` said handle norm ally in a rearward position, and a stolti-gage for limiting the rearward n'iovement of said handle.

8. in a typewriting machine, the con bination with a platen-frame, a platen journaled therein, and a regular line-space mechanism for said platen, of an auxiliary platen-trrning` mechanism comprising a gear connected to rotate the platen, a ratchet- Lesage@ wheel lined to said gear, an operatinghandie, and a pawl on said handle engageable with said ratchet-wheel when said handle is operated forwardly to rotate said platen, means for limiting the forward movement of said handle, a. plate 'fixed to and spaced from said frame, a stat/shaft fixed to said frame and projecting through said plate and upon which said auxiliary platen-turning mechanism is rotatably mounted, said ratchet-wheel lying adjacent said plate on one side thereof, said handle rotating adjacent said platen on the other side thereof, said ratchet-wheel having a recessed portion adjacent said platen, and a spring housed in said recessed portion between, said ratchet-wheel and said plate and connected to said shaft at one end and to said handle at the other end for opposing said forward movement and maintaininfjT said handle normally in a reaiwvard position.

9. ln a typewriting machine, the conibination with a platen-franie, a platen journaled therein, and a regular line-space mechanism for said platen, of an auxiliary platensturning mechanism comprising a gear connected to rotate the platen, a ratchet-wheel lined to said gear, an operating handle, and a pawl on said handle engageable with said ratchet-wheel when said handle is operated forwardly to rotate said platen, means for limiting the forward movement of said handle, a plate fixed to and spaced from said frame, a stubshaft fixed to said frame and projecting through said plate and upon which said auxiliary platen-turningr mechanism is rotatably mounted, said ratchet-wheel lying:T adjacent said platen on one side thereof, said handle rotating adjacent said platen on the other side thereof, said ratchet-wheel having a recessed portion adjacent said platen, a` spring,` housed in said recessed portion between said ratchet-wheel and said plate, said plate having* a segmental slot, and a pin fixed to said handle and projecting` through said slot, said spring?r being connected to said pin at one end and to said shaft at the other end for opposing` said forward movement and maintainingr said handle normally in a rearward position.

l0. ln a typewriting` machine, the combination with a. platen-frame, a platen journaled therein, and a regular line-space mechanism for said platen, of an auxiliary platen-turning mechanism comprising a gear connected to rotate the platen, a ratchet-wheel lined to said gear, an operating handle, and a pawl on said handle en- `gageal'ile with said ratchet-wheel when said handle is operated forwardly to rotate said platen, means for limiting the forward movement of said handle, a stub-shaft fixed to said frame and upon which said auxiliary platen-turning mechanism is rotatably mounted, said ratchet-wheel having a recess in its surface, a spring housed in said recess and connected t-o said shaft at one end and to said handle at the other end for opposing said forward movement and maintaining said handle normally in a rearward position, a stop-gage for limiting the rearward movementl of said handle, and means whereby said shaft may be adjusted to vary the tension of said spring.

11. ln a typewriting machine, the combination with a platen-frame, a platen journaled therein, and a regular line-space mechanism for said platen, of an auxiliary platen-turning mechanism comprising a gear connected to rotate the platen, a ratchet-wheel fixed to said gear, an ope-rating handle, and a pawl on said handle engagea-ble with said ratchet-wheel when said handle is operated forwardly to rotate said platen, means for limiting the forward movement of said handle, a hub on said frame, a stub-shaft journaled in said hub at one end, said auxiliary platen-turning mechanism being rotatably mounted on said shaft, said ratchet-wheel having a recess in its surface, a spring housed in said recess and connected to said shaft at one end and to said handle at the other end for opposing said forward movement and maintaining said handle normally in a rearward position, said shaft being rotatable in said hub to vary the tension of said spring, and means passing into said hub and engaging said shaft for fixing said shaft in position.

12. In a typewriting machine, a rotary platen, .and means for effecting and determining a gross line-spacing movement thereof, comprising a gear connected to rotate the platen, an operating lever, a pawl on the lever for driving the gear to move the platen in line-space direction, a toothed wheel in iirm connection with the platen, and means movable by the operating lever into positive interlockment with the teeth of the lastmentioned wheel, to arrest the platen, upon a predetermined throw of the lever in linespace direction.

13. In a typewriting machine, a rotary platen, and means for effecting and determining a gross line-spacing movement thereof, comprising a gear connected to rotate the platen, an operating lever, a pawl on the lever for driving the gear to move the platen in line-space direction, a toothed wheel in firm connection with the platen, an arm having a detent thereon, and means whereby the operating lever actuatesl the arm to move the detent thereof into positive interloclrment with the teeth of the lastmentioned wheel, to arrest the platen, upon a predetermined throw of the lever in linespace direction.

11i. In a typewriting machine, a rotary platen, and means for effecting and determining a gross line-spacing movementthereof, comprising a gear connected to rotate the platen, an operating lever, a pawl on the lever for driving the gear to move the platen in line-space direction, a toothed wheel in firm connection with the platen, a loosely-pivoted arm having a detent thereon, means whereby the operating lever actuates the arm, to cause the detent thereof to be interlocled positively with the teeth of the last-mentioned wheel upon a perdetermined throw of the lever in linespace direction, and a spring for disengaging the detent from the teeth when the operating lever is moved in return direction.

15. ln a type-writing machine, a rotary platen, and means for effecting and determining a gross line-spacing movement thereof, comprising a gear fast to the platen, another gear in mesh therewith, a ratchetwheel fixed to the last-mentioned gear, an operating lever pivoted eccentrically with respect to the platen, a pawl on the lever engageable with the ratche-t-wheel for movement of the latter in line-space direction, an arm loose on the axisr of the operating lever, a detent on the arm, and means whereby the operating lever actuates the arm to move the detent thereof into positive interloclment with the teeth of the first-mentioned gear, to arrest the platen, upon a predetermined throw of the lever in line-space direction.

16. In a typewriting machine, a rotary platen, and means foreffecting and determining a gross line-spacing movement thereof, comprising a gear connected to rotate the platen, an operating lever, a pawl on the lever for driving the gear to move the platen in line-space direction, and means in part on and fast to the platen-axle and in part movable by the operating lever to cause one of said parts to engage and hold the other of said parts, to arrest the platen, upon a predetermined throw of the lever in line-space direction.

17. In a typewriting machine, a rotary platen, and means for effect-ing and determining a gross line-spacing movement thereof', comprising a gear connected to rotate the platen, an operating lever, a pawl on the lever for driving the gear to move the platen in line-space direction, and means for positively locking the platen against overthrow, comprising a stop loosely set in the path of the leverto be picked up and carried by the latter to effective position, in which position the stop also serves to determine the throw of the lever.

18. In a typewriting machine, the combination with a platen-frame, a platen journaled therein, and a regular line-space mechanism for said platen, of platen-sweep mechanism comprising a ratchet, means operatively connecting the ratchet and platen,

a ratchet-opeiating handle having a one- Way driving Connection with the ratchet, an adjustable stop foi' determining a noinial idle position of the handle, a spring for returning the handle to said normal idle position` independently of the ratchet, and means for adjusting the tension of said spring to correspond to the setting of the adjustable stop to assure the full return of thel handle to said adjustable stop in eaeh of 10 the adjusted positions thereof Without unnecessary ifoiee.

ALFRED G. F. KUROWVSKI. lVitnesseS EDITH B. LIBBEY, JENNIE P. THORNE. 

